Carlin Isles: Double Olympic dream of 'rugby's fastest man'
Isles known as fastest man in rugby
Had hoped to also run 100m at Olympics
Isles believes he can go below 10 seconds
U.S. coach says Isles must choose his event
Carlin Isles has always had to do things the hard way.
From the age of eight, his life has been plagued by difficult decisions.
The sprinter-turned-rugby player was hoping to join an elite…
